diff --git a/clippy_config/src/msrvs.rs b/clippy_config/src/msrvs.rs
index 3507e106f..72d5b9aff 100644
--- a/clippy_config/src/msrvs.rs
+++ b/clippy_config/src/msrvs.rs
@@ -109,7 +109,7 @@ impl Msrv {
             if let Some(duplicate) = msrv_attrs.last() {
                 sess.dcx()
                     .struct_span_err(duplicate.span, "`clippy::msrv` is defined multiple times")
-                    .span_note(msrv_attr.span, "first definition found here")
+                    .with_span_note(msrv_attr.span, "first definition found here")
                     .emit();
             }
 
diff --git a/clippy_lints/src/casts/unnecessary_cast.rs b/clippy_lints/src/casts/unnecessary_cast.rs
index 849920bb7..3761ba81f 100644
--- a/clippy_lints/src/casts/unnecessary_cast.rs
+++ b/clippy_lints/src/casts/unnecessary_cast.rs
@@ -145,7 +145,7 @@ pub(super) fn check<'tcx>(
     if cast_from.kind() == cast_to.kind() && !in_external_macro(cx.sess(), expr.span) {
         if let Some(id) = path_to_local(cast_expr)
             && let Some(span) = cx.tcx.hir().opt_span(id)
-            && span.ctxt() != cast_expr.span.ctxt()
+            && !span.eq_ctxt(cast_expr.span)
         {
             // Binding context is different than the identifiers context.
             // Weird macro wizardry could be involved here.
diff --git a/clippy_lints/src/copies.rs b/clippy_lints/src/copies.rs
index d91af76f5..bd07c19a2 100644
--- a/clippy_lints/src/copies.rs
+++ b/clippy_lints/src/copies.rs
@@ -12,7 +12,6 @@ use rustc_errors::Applicability;
 use rustc_hir::def_id::DefIdSet;
 use rustc_hir::{intravisit, BinOpKind, Block, Expr, ExprKind, HirId, HirIdSet, Stmt, StmtKind};
 use rustc_lint::{LateContext, LateLintPass};
-use rustc_middle::query::Key;
 use rustc_session::impl_lint_pass;
 use rustc_span::hygiene::walk_chain;
 use rustc_span::source_map::SourceMap;
@@ -574,7 +573,7 @@ fn method_caller_is_mutable(cx: &LateContext<'_>, caller_expr: &Expr<'_>, ignore
     let caller_ty = cx.typeck_results().expr_ty(caller_expr);
     // Check if given type has inner mutability and was not set to ignored by the configuration
     let is_inner_mut_ty = is_interior_mut_ty(cx, caller_ty)
-        && !matches!(caller_ty.ty_adt_id(), Some(adt_id) if ignored_ty_ids.contains(&adt_id));
+        && !matches!(caller_ty.ty_adt_def(), Some(adt) if ignored_ty_ids.contains(&adt.did()));
 
     is_inner_mut_ty
         || caller_ty.is_mutable_ptr()
diff --git a/clippy_lints/src/doc/missing_headers.rs b/clippy_lints/src/doc/missing_headers.rs
index 4cbfa97a8..26f120cb3 100644
--- a/clippy_lints/src/doc/missing_headers.rs
+++ b/clippy_lints/src/doc/missing_headers.rs
@@ -72,7 +72,7 @@ pub fn check(
             && let body = cx.tcx.hir().body(body_id)
             && let ret_ty = typeck.expr_ty(body.value)
             && implements_trait(cx, ret_ty, future, &[])
-            && let ty::Coroutine(_, subs, _) = ret_ty.kind()
+            && let ty::Coroutine(_, subs) = ret_ty.kind()
             && is_type_diagnostic_item(cx, subs.as_coroutine().return_ty(), sym::Result)
         {
             span_lint(
diff --git a/clippy_lints/src/doc/needless_doctest_main.rs b/clippy_lints/src/doc/needless_doctest_main.rs
index c639813a3..a744b69ec 100644
--- a/clippy_lints/src/doc/needless_doctest_main.rs
+++ b/clippy_lints/src/doc/needless_doctest_main.rs
@@ -5,7 +5,7 @@ use crate::doc::{NEEDLESS_DOCTEST_MAIN, TEST_ATTR_IN_DOCTEST};
 use clippy_utils::diagnostics::span_lint;
 use rustc_ast::{CoroutineKind, Fn, FnRetTy, Item, ItemKind};
 use rustc_data_structures::sync::Lrc;
-use rustc_errors::emitter::EmitterWriter;
+use rustc_errors::emitter::HumanEmitter;
 use rustc_errors::DiagCtxt;
 use rustc_lint::LateContext;
 use rustc_parse::maybe_new_parser_from_source_str;
@@ -44,7 +44,7 @@ pub fn check(
 
                 let fallback_bundle =
                     rustc_errors::fallback_fluent_bundle(rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(), false);
-                let emitter = EmitterWriter::new(Box::new(io::sink()), fallback_bundle);
+                let emitter = HumanEmitter::new(Box::new(io::sink()), fallback_bundle);
                 let dcx = DiagCtxt::with_emitter(Box::new(emitter)).disable_warnings();
                 #[expect(clippy::arc_with_non_send_sync)] // `Lrc` is expected by with_dcx
                 let sm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
diff --git a/clippy_lints/src/entry.rs b/clippy_lints/src/entry.rs
index ce0a1dfdc..0b4bc375d 100644
--- a/clippy_lints/src/entry.rs
+++ b/clippy_lints/src/entry.rs
@@ -8,7 +8,7 @@ use core::fmt::{self, Write};
 use rustc_errors::Applicability;
 use rustc_hir::hir_id::HirIdSet;
 use rustc_hir::intravisit::{walk_expr, Visitor};
-use rustc_hir::{Block, Expr, ExprKind, Guard, HirId, Let, Pat, Stmt, StmtKind, UnOp};
+use rustc_hir::{Block, Expr, ExprKind, HirId, Pat, Stmt, StmtKind, UnOp};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::declare_lint_pass;
 use rustc_span::{Span, SyntaxContext, DUMMY_SP};
@@ -465,7 +465,7 @@ impl<'tcx> Visitor<'tcx> for InsertSearcher<'_, 'tcx> {
                     let mut is_map_used = self.is_map_used;
                     for arm in arms {
                         self.visit_pat(arm.pat);
-                        if let Some(Guard::If(guard) | Guard::IfLet(&Let { init: guard, .. })) = arm.guard {
+                        if let Some(guard) = arm.guard {
                             self.visit_non_tail_expr(guard);
                         }
                         is_map_used |= self.visit_cond_arm(arm.body);
diff --git a/clippy_lints/src/implicit_hasher.rs b/clippy_lints/src/implicit_hasher.rs
index 43eb6a9b8..788fe8287 100644
--- a/clippy_lints/src/implicit_hasher.rs
+++ b/clippy_lints/src/implicit_hasher.rs
@@ -118,7 +118,7 @@ impl<'tcx> LateLintPass<'tcx> for ImplicitHasher {
                 vis.visit_ty(impl_.self_ty);
 
                 for target in &vis.found {
-                    if item.span.ctxt() != target.span().ctxt() {
+                    if !item.span.eq_ctxt(target.span()) {
                         return;
                     }
 
diff --git a/clippy_lints/src/implicit_return.rs b/clippy_lints/src/implicit_return.rs
index d68c5c4ba..5288efd8d 100644
--- a/clippy_lints/src/implicit_return.rs
+++ b/clippy_lints/src/implicit_return.rs
@@ -225,7 +225,7 @@ impl<'tcx> LateLintPass<'tcx> for ImplicitReturn {
         _: LocalDefId,
     ) {
         if (!matches!(kind, FnKind::Closure) && matches!(decl.output, FnRetTy::DefaultReturn(_)))
-            || span.ctxt() != body.value.span.ctxt()
+            || !span.eq_ctxt(body.value.span)
             || in_external_macro(cx.sess(), span)
         {
             return;
diff --git a/clippy_lints/src/manual_clamp.rs b/clippy_lints/src/manual_clamp.rs
index 385fe387a..0da309f95 100644
--- a/clippy_lints/src/manual_clamp.rs
+++ b/clippy_lints/src/manual_clamp.rs
@@ -11,7 +11,7 @@ use clippy_utils::{
 use itertools::Itertools;
 use rustc_errors::{Applicability, Diagnostic};
 use rustc_hir::def::Res;
-use rustc_hir::{Arm, BinOpKind, Block, Expr, ExprKind, Guard, HirId, PatKind, PathSegment, PrimTy, QPath, StmtKind};
+use rustc_hir::{Arm, BinOpKind, Block, Expr, ExprKind, HirId, PatKind, PathSegment, PrimTy, QPath, StmtKind};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::ty::Ty;
 use rustc_session::impl_lint_pass;
@@ -394,7 +394,7 @@ fn is_match_pattern<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) -> Opt
         // Find possible min/max branches
         let minmax_values = |a: &'tcx Arm<'tcx>| {
             if let PatKind::Binding(_, var_hir_id, _, None) = &a.pat.kind
-                && let Some(Guard::If(e)) = a.guard
+                && let Some(e) = a.guard
             {
                 Some((e, var_hir_id, a.body))
             } else {
diff --git a/clippy_lints/src/matches/collapsible_match.rs b/clippy_lints/src/matches/collapsible_match.rs
index 91e6ca7fa..5fef5930f 100644
--- a/clippy_lints/src/matches/collapsible_match.rs
+++ b/clippy_lints/src/matches/collapsible_match.rs
@@ -7,7 +7,7 @@ use clippy_utils::{
 };
 use rustc_errors::MultiSpan;
 use rustc_hir::LangItem::OptionNone;
-use rustc_hir::{Arm, Expr, Guard, HirId, Let, Pat, PatKind};
+use rustc_hir::{Arm, Expr, HirId, Pat, PatKind};
 use rustc_lint::LateContext;
 use rustc_span::Span;
 
@@ -16,7 +16,7 @@ use super::COLLAPSIBLE_MATCH;
 pub(super) fn check_match<'tcx>(cx: &LateContext<'tcx>, arms: &'tcx [Arm<'_>]) {
     if let Some(els_arm) = arms.iter().rfind(|arm| arm_is_wild_like(cx, arm)) {
         for arm in arms {
-            check_arm(cx, true, arm.pat, arm.body, arm.guard.as_ref(), Some(els_arm.body));
+            check_arm(cx, true, arm.pat, arm.body, arm.guard, Some(els_arm.body));
         }
     }
 }
@@ -35,7 +35,7 @@ fn check_arm<'tcx>(
     outer_is_match: bool,
     outer_pat: &'tcx Pat<'tcx>,
     outer_then_body: &'tcx Expr<'tcx>,
-    outer_guard: Option<&'tcx Guard<'tcx>>,
+    outer_guard: Option<&'tcx Expr<'tcx>>,
     outer_else_body: Option<&'tcx Expr<'tcx>>,
 ) {
     let inner_expr = peel_blocks_with_stmt(outer_then_body);
@@ -71,7 +71,7 @@ fn check_arm<'tcx>(
         // the binding must not be used in the if guard
         && outer_guard.map_or(
             true,
-            |(Guard::If(e) | Guard::IfLet(Let { init: e, .. }))| !is_local_used(cx, *e, binding_id)
+            |e| !is_local_used(cx, e, binding_id)
         )
         // ...or anywhere in the inner expression
         && match inner {
diff --git a/clippy_lints/src/matches/match_like_matches.rs b/clippy_lints/src/matches/match_like_matches.rs
index 56123326f..b062e81ce 100644
--- a/clippy_lints/src/matches/match_like_matches.rs
+++ b/clippy_lints/src/matches/match_like_matches.rs
@@ -4,7 +4,7 @@ use clippy_utils::source::snippet_with_applicability;
 use clippy_utils::{is_lint_allowed, is_wild, span_contains_comment};
 use rustc_ast::{Attribute, LitKind};
 use rustc_errors::Applicability;
-use rustc_hir::{Arm, BorrowKind, Expr, ExprKind, Guard, Pat, PatKind, QPath};
+use rustc_hir::{Arm, BorrowKind, Expr, ExprKind, Pat, PatKind, QPath};
 use rustc_lint::{LateContext, LintContext};
 use rustc_middle::ty;
 use rustc_span::source_map::Spanned;
@@ -41,14 +41,8 @@ pub(super) fn check_match<'tcx>(
     find_matches_sugg(
         cx,
         scrutinee,
-        arms.iter().map(|arm| {
-            (
-                cx.tcx.hir().attrs(arm.hir_id),
-                Some(arm.pat),
-                arm.body,
-                arm.guard.as_ref(),
-            )
-        }),
+        arms.iter()
+            .map(|arm| (cx.tcx.hir().attrs(arm.hir_id), Some(arm.pat), arm.body, arm.guard)),
         e,
         false,
     )
@@ -67,14 +61,7 @@ where
     I: Clone
         + DoubleEndedIterator
         + ExactSizeIterator
-        + Iterator<
-            Item = (
-                &'a [Attribute],
-                Option<&'a Pat<'b>>,
-                &'a Expr<'b>,
-                Option<&'a Guard<'b>>,
-            ),
-        >,
+        + Iterator<Item = (&'a [Attribute], Option<&'a Pat<'b>>, &'a Expr<'b>, Option<&'a Expr<'b>>)>,
 {
     if !span_contains_comment(cx.sess().source_map(), expr.span)
         && iter.len() >= 2
@@ -115,7 +102,7 @@ where
                 })
                 .join(" | ")
         };
-        let pat_and_guard = if let Some(Guard::If(g)) = first_guard {
+        let pat_and_guard = if let Some(g) = first_guard {
             format!(
                 "{pat} if {}",
                 snippet_with_applicability(cx, g.span, "..", &mut applicability)
diff --git a/clippy_lints/src/matches/needless_match.rs b/clippy_lints/src/matches/needless_match.rs
index 44dc29c36..cc482f15a 100644
--- a/clippy_lints/src/matches/needless_match.rs
+++ b/clippy_lints/src/matches/needless_match.rs
@@ -8,7 +8,7 @@ use clippy_utils::{
 };
 use rustc_errors::Applicability;
 use rustc_hir::LangItem::OptionNone;
-use rustc_hir::{Arm, BindingAnnotation, ByRef, Expr, ExprKind, Guard, ItemKind, Node, Pat, PatKind, Path, QPath};
+use rustc_hir::{Arm, BindingAnnotation, ByRef, Expr, ExprKind, ItemKind, Node, Pat, PatKind, Path, QPath};
 use rustc_lint::LateContext;
 use rustc_span::sym;
 
@@ -66,18 +66,9 @@ fn check_all_arms(cx: &LateContext<'_>, match_expr: &Expr<'_>, arms: &[Arm<'_>])
         let arm_expr = peel_blocks_with_stmt(arm.body);
 
         if let Some(guard_expr) = &arm.guard {
-            match guard_expr {
-                // gives up if `pat if expr` can have side effects
-                Guard::If(if_cond) => {
-                    if if_cond.can_have_side_effects() {
-                        return false;
-                    }
-                },
-                // gives up `pat if let ...` arm
-                Guard::IfLet(_) => {
-                    return false;
-                },
-            };
+            if guard_expr.can_have_side_effects() {
+                return false;
+            }
         }
 
         if let PatKind::Wild = arm.pat.kind {
diff --git a/clippy_lints/src/matches/redundant_guards.rs b/clippy_lints/src/matches/redundant_guards.rs
index f57b22374..dfaaeb14c 100644
--- a/clippy_lints/src/matches/redundant_guards.rs
+++ b/clippy_lints/src/matches/redundant_guards.rs
@@ -5,7 +5,7 @@ use clippy_utils::visitors::{for_each_expr, is_local_used};
 use rustc_ast::{BorrowKind, LitKind};
 use rustc_errors::Applicability;
 use rustc_hir::def::{DefKind, Res};
-use rustc_hir::{Arm, BinOpKind, Expr, ExprKind, Guard, MatchSource, Node, Pat, PatKind};
+use rustc_hir::{Arm, BinOpKind, Expr, ExprKind, MatchSource, Node, Pat, PatKind};
 use rustc_lint::LateContext;
 use rustc_span::symbol::Ident;
 use rustc_span::{Span, Symbol};
@@ -21,20 +21,19 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, arms: &'tcx [Arm<'tcx>]) {
         };
 
         // `Some(x) if matches!(x, y)`
-        if let Guard::If(if_expr) = guard
-            && let ExprKind::Match(
-                scrutinee,
-                [
-                    arm,
-                    Arm {
-                        pat: Pat {
-                            kind: PatKind::Wild, ..
-                        },
-                        ..
+        if let ExprKind::Match(
+            scrutinee,
+            [
+                arm,
+                Arm {
+                    pat: Pat {
+                        kind: PatKind::Wild, ..
                     },
-                ],
-                MatchSource::Normal,
-            ) = if_expr.kind
+                    ..
+                },
+            ],
+            MatchSource::Normal,
+        ) = guard.kind
             && let Some(binding) = get_pat_binding(cx, scrutinee, outer_arm)
         {
             let pat_span = match (arm.pat.kind, binding.byref_ident) {
@@ -45,14 +44,14 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, arms: &'tcx [Arm<'tcx>]) {
             emit_redundant_guards(
                 cx,
                 outer_arm,
-                if_expr.span,
+                guard.span,
                 snippet(cx, pat_span, "<binding>"),
                 &binding,
                 arm.guard,
             );
         }
         // `Some(x) if let Some(2) = x`
-        else if let Guard::IfLet(let_expr) = guard
+        else if let ExprKind::Let(let_expr) = guard.kind
             && let Some(binding) = get_pat_binding(cx, let_expr.init, outer_arm)
         {
             let pat_span = match (let_expr.pat.kind, binding.byref_ident) {
@@ -71,8 +70,7 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, arms: &'tcx [Arm<'tcx>]) {
         }
         // `Some(x) if x == Some(2)`
         // `Some(x) if Some(2) == x`
-        else if let Guard::If(if_expr) = guard
-            && let ExprKind::Binary(bin_op, local, pat) = if_expr.kind
+        else if let ExprKind::Binary(bin_op, local, pat) = guard.kind
             && matches!(bin_op.node, BinOpKind::Eq)
             // Ensure they have the same type. If they don't, we'd need deref coercion which isn't
             // possible (currently) in a pattern. In some cases, you can use something like
@@ -96,16 +94,15 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, arms: &'tcx [Arm<'tcx>]) {
             emit_redundant_guards(
                 cx,
                 outer_arm,
-                if_expr.span,
+                guard.span,
                 snippet(cx, pat_span, "<binding>"),
                 &binding,
                 None,
             );
-        } else if let Guard::If(if_expr) = guard
-            && let ExprKind::MethodCall(path, recv, args, ..) = if_expr.kind
+        } else if let ExprKind::MethodCall(path, recv, args, ..) = guard.kind
             && let Some(binding) = get_pat_binding(cx, recv, outer_arm)
         {
-            check_method_calls(cx, outer_arm, path.ident.name, recv, args, if_expr, &binding);
+            check_method_calls(cx, outer_arm, path.ident.name, recv, args, guard, &binding);
         }
     }
 }
@@ -216,7 +213,7 @@ fn emit_redundant_guards<'tcx>(
     guard_span: Span,
     binding_replacement: Cow<'static, str>,
     pat_binding: &PatBindingInfo,
-    inner_guard: Option<Guard<'_>>,
+    inner_guard: Option<&Expr<'_>>,
 ) {
     span_lint_and_then(
         cx,
@@ -242,12 +239,7 @@ fn emit_redundant_guards<'tcx>(
                     (
                         guard_span.source_callsite().with_lo(outer_arm.pat.span.hi()),
                         inner_guard.map_or_else(String::new, |guard| {
-                            let (prefix, span) = match guard {
-                                Guard::If(e) => ("if", e.span),
-                                Guard::IfLet(l) => ("if let", l.span),
-                            };
-
-                            format!(" {prefix} {}", snippet(cx, span, "<guard>"))
+                            format!(" if {}", snippet(cx, guard.span, "<guard>"))
                         }),
                     ),
                 ],
diff --git a/clippy_lints/src/matches/redundant_pattern_match.rs b/clippy_lints/src/matches/redundant_pattern_match.rs
index a4acdfb1d..b5870d94d 100644
--- a/clippy_lints/src/matches/redundant_pattern_match.rs
+++ b/clippy_lints/src/matches/redundant_pattern_match.rs
@@ -9,7 +9,7 @@ use rustc_ast::ast::LitKind;
 use rustc_errors::Applicability;
 use rustc_hir::def::{DefKind, Res};
 use rustc_hir::LangItem::{self, OptionNone, OptionSome, PollPending, PollReady, ResultErr, ResultOk};
-use rustc_hir::{Arm, Expr, ExprKind, Guard, Node, Pat, PatKind, QPath, UnOp};
+use rustc_hir::{Arm, Expr, ExprKind, Node, Pat, PatKind, QPath, UnOp};
 use rustc_lint::LateContext;
 use rustc_middle::ty::{self, GenericArgKind, Ty};
 use rustc_span::{sym, Span, Symbol};
@@ -277,8 +277,6 @@ pub(super) fn check_match<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>, op
             let mut sugg = format!("{}.{good_method}", snippet(cx, result_expr.span, "_"));
 
             if let Some(guard) = maybe_guard {
-                let Guard::If(guard) = *guard else { return }; // `...is_none() && let ...` is a syntax error
-
                 // wow, the HIR for match guards in `PAT if let PAT = expr && expr => ...` is annoying!
                 // `guard` here is `Guard::If` with the let expression somewhere deep in the tree of exprs,
                 // counter to the intuition that it should be `Guard::IfLet`, so we need another check
@@ -319,7 +317,7 @@ fn found_good_method<'tcx>(
     cx: &LateContext<'_>,
     arms: &'tcx [Arm<'tcx>],
     node: (&PatKind<'_>, &PatKind<'_>),
-) -> Option<(&'static str, Option<&'tcx Guard<'tcx>>)> {
+) -> Option<(&'static str, Option<&'tcx Expr<'tcx>>)> {
     match node {
         (
             PatKind::TupleStruct(ref path_left, patterns_left, _),
@@ -409,7 +407,7 @@ fn get_good_method<'tcx>(
     cx: &LateContext<'_>,
     arms: &'tcx [Arm<'tcx>],
     path_left: &QPath<'_>,
-) -> Option<(&'static str, Option<&'tcx Guard<'tcx>>)> {
+) -> Option<(&'static str, Option<&'tcx Expr<'tcx>>)> {
     if let Some(name) = get_ident(path_left) {
         let (expected_item_left, should_be_left, should_be_right) = match name.as_str() {
             "Ok" => (Item::Lang(ResultOk), "is_ok()", "is_err()"),
@@ -478,7 +476,7 @@ fn find_good_method_for_match<'a, 'tcx>(
     expected_item_right: Item,
     should_be_left: &'a str,
     should_be_right: &'a str,
-) -> Option<(&'a str, Option<&'tcx Guard<'tcx>>)> {
+) -> Option<(&'a str, Option<&'tcx Expr<'tcx>>)> {
     let first_pat = arms[0].pat;
     let second_pat = arms[1].pat;
 
@@ -496,8 +494,8 @@ fn find_good_method_for_match<'a, 'tcx>(
 
     match body_node_pair {
         (ExprKind::Lit(lit_left), ExprKind::Lit(lit_right)) => match (&lit_left.node, &lit_right.node) {
-            (LitKind::Bool(true), LitKind::Bool(false)) => Some((should_be_left, arms[0].guard.as_ref())),
-            (LitKind::Bool(false), LitKind::Bool(true)) => Some((should_be_right, arms[1].guard.as_ref())),
+            (LitKind::Bool(true), LitKind::Bool(false)) => Some((should_be_left, arms[0].guard)),
+            (LitKind::Bool(false), LitKind::Bool(true)) => Some((should_be_right, arms[1].guard)),
             _ => None,
         },
         _ => None,
@@ -511,7 +509,7 @@ fn find_good_method_for_matches_macro<'a, 'tcx>(
     expected_item_left: Item,
     should_be_left: &'a str,
     should_be_right: &'a str,
-) -> Option<(&'a str, Option<&'tcx Guard<'tcx>>)> {
+) -> Option<(&'a str, Option<&'tcx Expr<'tcx>>)> {
     let first_pat = arms[0].pat;
 
     let body_node_pair = if is_pat_variant(cx, first_pat, path_left, expected_item_left) {
@@ -522,8 +520,8 @@ fn find_good_method_for_matches_macro<'a, 'tcx>(
 
     match body_node_pair {
         (ExprKind::Lit(lit_left), ExprKind::Lit(lit_right)) => match (&lit_left.node, &lit_right.node) {
-            (LitKind::Bool(true), LitKind::Bool(false)) => Some((should_be_left, arms[0].guard.as_ref())),
-            (LitKind::Bool(false), LitKind::Bool(true)) => Some((should_be_right, arms[1].guard.as_ref())),
+            (LitKind::Bool(true), LitKind::Bool(false)) => Some((should_be_left, arms[0].guard)),
+            (LitKind::Bool(false), LitKind::Bool(true)) => Some((should_be_right, arms[1].guard)),
             _ => None,
         },
         _ => None,
diff --git a/clippy_lints/src/methods/drain_collect.rs b/clippy_lints/src/methods/drain_collect.rs
index 6a82d8f75..3a8ca3761 100644
--- a/clippy_lints/src/methods/drain_collect.rs
+++ b/clippy_lints/src/methods/drain_collect.rs
@@ -6,7 +6,6 @@ use clippy_utils::ty::is_type_lang_item;
 use rustc_errors::Applicability;
 use rustc_hir::{Expr, ExprKind, LangItem, Path, QPath};
 use rustc_lint::LateContext;
-use rustc_middle::query::Key;
 use rustc_middle::ty;
 use rustc_middle::ty::Ty;
 use rustc_span::{sym, Symbol};
@@ -18,10 +17,10 @@ use rustc_span::{sym, Symbol};
 /// `vec![1,2].drain(..).collect::<HashSet<_>>()`
 ///  ^^^^^^^^^                     ^^^^^^^^^^  false
 fn types_match_diagnostic_item(cx: &LateContext<'_>, expr: Ty<'_>, recv: Ty<'_>, sym: Symbol) -> bool {
-    if let Some(expr_adt_did) = expr.ty_adt_id()
-        && let Some(recv_adt_did) = recv.ty_adt_id()
+    if let Some(expr_adt) = expr.ty_adt_def()
+        && let Some(recv_adt) = recv.ty_adt_def()
     {
-        cx.tcx.is_diagnostic_item(sym, expr_adt_did) && cx.tcx.is_diagnostic_item(sym, recv_adt_did)
+        cx.tcx.is_diagnostic_item(sym, expr_adt.did()) && cx.tcx.is_diagnostic_item(sym, recv_adt.did())
     } else {
         false
     }
diff --git a/clippy_lints/src/methods/iter_overeager_cloned.rs b/clippy_lints/src/methods/iter_overeager_cloned.rs
index eac6df054..b2fe129cd 100644
--- a/clippy_lints/src/methods/iter_overeager_cloned.rs
+++ b/clippy_lints/src/methods/iter_overeager_cloned.rs
@@ -22,7 +22,7 @@ pub(super) enum Op<'a> {
 
     // rm `.cloned()`
     // e.g. `map` `for_each` `all` `any`
-    NeedlessMove(&'a str, &'a Expr<'a>),
+    NeedlessMove(&'a Expr<'a>),
 
     // later `.cloned()`
     // and add `&` to the parameter of closure parameter
@@ -59,7 +59,7 @@ pub(super) fn check<'tcx>(
             return;
         }
 
-        if let Op::NeedlessMove(_, expr) = op {
+        if let Op::NeedlessMove(expr) = op {
             let rustc_hir::ExprKind::Closure(closure) = expr.kind else {
                 return;
             };
@@ -104,7 +104,7 @@ pub(super) fn check<'tcx>(
         }
 
         let (lint, msg, trailing_clone) = match op {
-            Op::RmCloned | Op::NeedlessMove(_, _) => (REDUNDANT_CLONE, "unneeded cloning of iterator items", ""),
+            Op::RmCloned | Op::NeedlessMove(_) => (REDUNDANT_CLONE, "unneeded cloning of iterator items", ""),
             Op::LaterCloned | Op::FixClosure(_, _) => (
                 ITER_OVEREAGER_CLONED,
                 "unnecessarily eager cloning of iterator items",
@@ -133,7 +133,7 @@ pub(super) fn check<'tcx>(
                     diag.span_suggestion(replace_span, "try", snip, Applicability::MachineApplicable);
                 }
             },
-            Op::NeedlessMove(_, _) => {
+            Op::NeedlessMove(_) => {
                 let method_span = expr.span.with_lo(cloned_call.span.hi());
                 if let Some(snip) = snippet_opt(cx, method_span) {
                     let replace_span = expr.span.with_lo(cloned_recv.span.hi());
diff --git a/clippy_lints/src/methods/mod.rs b/clippy_lints/src/methods/mod.rs
index cf6f6ad1a..89ea3597d 100644
--- a/clippy_lints/src/methods/mod.rs
+++ b/clippy_lints/src/methods/mod.rs
@@ -4273,7 +4273,7 @@ impl Methods {
                             expr,
                             recv,
                             recv2,
-                            iter_overeager_cloned::Op::NeedlessMove(name, arg),
+                            iter_overeager_cloned::Op::NeedlessMove(arg),
                             false,
                         );
                     }
@@ -4291,7 +4291,7 @@ impl Methods {
                         expr,
                         recv,
                         recv2,
-                        iter_overeager_cloned::Op::NeedlessMove(name, arg),
+                        iter_overeager_cloned::Op::NeedlessMove(arg),
                         false,
                     ),
                     Some(("chars", recv, _, _, _))
@@ -4469,7 +4469,7 @@ impl Methods {
                         expr,
                         recv,
                         recv2,
-                        iter_overeager_cloned::Op::NeedlessMove(name, arg),
+                        iter_overeager_cloned::Op::NeedlessMove(arg),
                         false,
                     ),
                     _ => {},
@@ -4523,7 +4523,7 @@ impl Methods {
                                 expr,
                                 recv,
                                 recv2,
-                                iter_overeager_cloned::Op::NeedlessMove(name, m_arg),
+                                iter_overeager_cloned::Op::NeedlessMove(m_arg),
                                 false,
                             ),
                             _ => {},
diff --git a/clippy_lints/src/methods/option_map_unwrap_or.rs b/clippy_lints/src/methods/option_map_unwrap_or.rs
index 35deabe49..624597ffc 100644
--- a/clippy_lints/src/methods/option_map_unwrap_or.rs
+++ b/clippy_lints/src/methods/option_map_unwrap_or.rs
@@ -67,7 +67,7 @@ pub(super) fn check<'tcx>(
             }
         }
 
-        if unwrap_arg.span.ctxt() != map_span.ctxt() {
+        if !unwrap_arg.span.eq_ctxt(map_span) {
             return;
         }
 
diff --git a/clippy_lints/src/methods/redundant_as_str.rs b/clippy_lints/src/methods/redundant_as_str.rs
index 98cd6afc2..24de1979c 100644
--- a/clippy_lints/src/methods/redundant_as_str.rs
+++ b/clippy_lints/src/methods/redundant_as_str.rs
@@ -4,7 +4,6 @@ use clippy_utils::source::snippet_with_applicability;
 use rustc_errors::Applicability;
 use rustc_hir::Expr;
 use rustc_lint::LateContext;
-use rustc_middle::query::Key;
 use rustc_span::Span;
 
 pub(super) fn check(
@@ -15,10 +14,10 @@ pub(super) fn check(
     other_method_span: Span,
 ) {
     if cx
-        .tcx
-        .lang_items()
-        .string()
-        .is_some_and(|id| Some(id) == cx.typeck_results().expr_ty(recv).ty_adt_id())
+        .typeck_results()
+        .expr_ty(recv)
+        .ty_adt_def()
+        .is_some_and(|adt| Some(adt.did()) == cx.tcx.lang_items().string())
     {
         let mut applicability = Applicability::MachineApplicable;
         span_lint_and_sugg(
diff --git a/clippy_lints/src/methods/unnecessary_to_owned.rs b/clippy_lints/src/methods/unnecessary_to_owned.rs
index 12106d44e..64fcd9f8f 100644
--- a/clippy_lints/src/methods/unnecessary_to_owned.rs
+++ b/clippy_lints/src/methods/unnecessary_to_owned.rs
@@ -463,7 +463,9 @@ fn can_change_type<'a>(cx: &LateContext<'a>, mut expr: &'a Expr<'a>, mut ty: Ty<
                         .chain(call_args)
                         .position(|arg| arg.hir_id == expr.hir_id)
                         && let param_ty = fn_sig.input(arg_index).skip_binder()
-                        && let ty::Param(ParamTy { index: param_index, .. }) = *param_ty.kind()
+                        && let ty::Param(ParamTy { index: param_index , ..}) = *param_ty.kind()
+                        // https://github.com/rust-lang/rust-clippy/issues/9504 and https://github.com/rust-lang/rust-clippy/issues/10021
+                        && (param_index as usize) < call_generic_args.len()
                     {
                         if fn_sig
                             .skip_binder()
diff --git a/clippy_lints/src/mixed_read_write_in_expression.rs b/clippy_lints/src/mixed_read_write_in_expression.rs
index 3ff40081c..195ce1762 100644
--- a/clippy_lints/src/mixed_read_write_in_expression.rs
+++ b/clippy_lints/src/mixed_read_write_in_expression.rs
@@ -1,7 +1,7 @@
 use clippy_utils::diagnostics::{span_lint, span_lint_and_note};
 use clippy_utils::{get_parent_expr, path_to_local, path_to_local_id};
 use rustc_hir::intravisit::{walk_expr, Visitor};
-use rustc_hir::{BinOpKind, Block, Expr, ExprKind, Guard, HirId, Local, Node, Stmt, StmtKind};
+use rustc_hir::{BinOpKind, Block, Expr, ExprKind, HirId, Local, Node, Stmt, StmtKind};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::ty;
 use rustc_session::declare_lint_pass;
@@ -119,7 +119,7 @@ impl<'a, 'tcx> DivergenceVisitor<'a, 'tcx> {
             ExprKind::Match(e, arms, _) => {
                 self.visit_expr(e);
                 for arm in arms {
-                    if let Some(Guard::If(if_expr)) = arm.guard {
+                    if let Some(if_expr) = arm.guard {
                         self.visit_expr(if_expr);
                     }
                     // make sure top level arm expressions aren't linted
diff --git a/clippy_lints/src/mut_key.rs b/clippy_lints/src/mut_key.rs
index 04d2ced6a..c32025fcb 100644
--- a/clippy_lints/src/mut_key.rs
+++ b/clippy_lints/src/mut_key.rs
@@ -4,7 +4,6 @@ use clippy_utils::{def_path_def_ids, trait_ref_of_method};
 use rustc_data_structures::fx::FxHashSet;
 use rustc_hir as hir;
 use rustc_lint::{LateContext, LateLintPass};
-use rustc_middle::query::Key;
 use rustc_middle::ty::{Adt, Ty};
 use rustc_session::impl_lint_pass;
 use rustc_span::def_id::LocalDefId;
@@ -166,7 +165,7 @@ impl MutableKeyType {
             // Determines if a type contains interior mutability which would affect its implementation of
             // [`Hash`] or [`Ord`].
             if is_interior_mut_ty(cx, subst_ty)
-                && !matches!(subst_ty.ty_adt_id(), Some(adt_id) if self.ignore_mut_def_ids.contains(&adt_id))
+                && !matches!(subst_ty.ty_adt_def(), Some(adt) if self.ignore_mut_def_ids.contains(&adt.did()))
             {
                 span_lint(cx, MUTABLE_KEY_TYPE, span, "mutable key type");
             }
diff --git a/clippy_lints/src/non_copy_const.rs b/clippy_lints/src/non_copy_const.rs
index 4013cb345..f8365deeb 100644
--- a/clippy_lints/src/non_copy_const.rs
+++ b/clippy_lints/src/non_copy_const.rs
@@ -15,7 +15,6 @@ use rustc_hir::{
 };
 use rustc_lint::{LateContext, LateLintPass, Lint};
 use rustc_middle::mir::interpret::{ErrorHandled, EvalToValTreeResult, GlobalId};
-use rustc_middle::query::Key;
 use rustc_middle::ty::adjustment::Adjust;
 use rustc_middle::ty::{self, Ty, TyCtxt};
 use rustc_session::impl_lint_pass;
@@ -188,7 +187,7 @@ impl NonCopyConst {
     }
 
     fn is_ty_ignored(&self, ty: Ty<'_>) -> bool {
-        matches!(ty.ty_adt_id(), Some(adt_id) if self.ignore_mut_def_ids.contains(&adt_id))
+        matches!(ty.ty_adt_def(), Some(adt) if self.ignore_mut_def_ids.contains(&adt.did()))
     }
 
     fn is_unfrozen<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>) -> bool {
diff --git a/clippy_lints/src/question_mark.rs b/clippy_lints/src/question_mark.rs
index 509d9483e..bd3128a0f 100644
--- a/clippy_lints/src/question_mark.rs
+++ b/clippy_lints/src/question_mark.rs
@@ -75,13 +75,7 @@ enum IfBlockType<'hir> {
     /// An `if x.is_xxx() { a } else { b } ` expression.
     ///
     /// Contains: caller (x), caller_type, call_sym (is_xxx), if_then (a), if_else (b)
-    IfIs(
-        &'hir Expr<'hir>,
-        Ty<'hir>,
-        Symbol,
-        &'hir Expr<'hir>,
-        Option<&'hir Expr<'hir>>,
-    ),
+    IfIs(&'hir Expr<'hir>, Ty<'hir>, Symbol, &'hir Expr<'hir>),
     /// An `if let Xxx(a) = b { c } else { d }` expression.
     ///
     /// Contains: let_pat_qpath (Xxx), let_pat_type, let_pat_sym (a), let_expr (b), if_then (c),
@@ -143,7 +137,7 @@ fn check_let_some_else_return_none(cx: &LateContext<'_>, stmt: &Stmt<'_>) {
 
 fn is_early_return(smbl: Symbol, cx: &LateContext<'_>, if_block: &IfBlockType<'_>) -> bool {
     match *if_block {
-        IfBlockType::IfIs(caller, caller_ty, call_sym, if_then, _) => {
+        IfBlockType::IfIs(caller, caller_ty, call_sym, if_then) => {
             // If the block could be identified as `if x.is_none()/is_err()`,
             // we then only need to check the if_then return to see if it is none/err.
             is_type_diagnostic_item(cx, caller_ty, smbl)
@@ -235,7 +229,7 @@ impl QuestionMark {
             && !is_else_clause(cx.tcx, expr)
             && let ExprKind::MethodCall(segment, caller, ..) = &cond.kind
             && let caller_ty = cx.typeck_results().expr_ty(caller)
-            && let if_block = IfBlockType::IfIs(caller, caller_ty, segment.ident.name, then, r#else)
+            && let if_block = IfBlockType::IfIs(caller, caller_ty, segment.ident.name, then)
             && (is_early_return(sym::Option, cx, &if_block) || is_early_return(sym::Result, cx, &if_block))
         {
             let mut applicability = Applicability::MachineApplicable;
diff --git a/clippy_lints/src/transmute/transmute_int_to_non_zero.rs b/clippy_lints/src/transmute/transmute_int_to_non_zero.rs
index c0d0d2b93..5df645491 100644
--- a/clippy_lints/src/transmute/transmute_int_to_non_zero.rs
+++ b/clippy_lints/src/transmute/transmute_int_to_non_zero.rs
@@ -4,7 +4,6 @@ use clippy_utils::sugg;
 use rustc_errors::Applicability;
 use rustc_hir::Expr;
 use rustc_lint::LateContext;
-use rustc_middle::query::Key;
 use rustc_middle::ty::{self, Ty};
 use rustc_span::symbol::sym;
 
@@ -17,10 +16,10 @@ pub(super) fn check<'tcx>(
     to_ty: Ty<'tcx>,
     arg: &'tcx Expr<'_>,
 ) -> bool {
-    let (ty::Int(_) | ty::Uint(_), Some(to_ty_id)) = (&from_ty.kind(), to_ty.ty_adt_id()) else {
+    let (ty::Int(_) | ty::Uint(_), Some(to_ty_adt)) = (&from_ty.kind(), to_ty.ty_adt_def()) else {
         return false;
     };
-    let Some(to_type_sym) = cx.tcx.get_diagnostic_name(to_ty_id) else {
+    let Some(to_type_sym) = cx.tcx.get_diagnostic_name(to_ty_adt.did()) else {
         return false;
     };
 
diff --git a/clippy_lints/src/transmute/transmute_undefined_repr.rs b/clippy_lints/src/transmute/transmute_undefined_repr.rs
index a65bc0ce4..a6f03c85b 100644
--- a/clippy_lints/src/transmute/transmute_undefined_repr.rs
+++ b/clippy_lints/src/transmute/transmute_undefined_repr.rs
@@ -26,20 +26,18 @@ pub(super) fn check<'tcx>(
 
             // `Repr(C)` <-> unordered type.
             // If the first field of the `Repr(C)` type matches then the transmute is ok
-            (ReducedTy::OrderedFields(_, Some(from_sub_ty)), ReducedTy::UnorderedFields(to_sub_ty))
-            | (ReducedTy::UnorderedFields(from_sub_ty), ReducedTy::OrderedFields(_, Some(to_sub_ty))) => {
+            (ReducedTy::OrderedFields(Some(from_sub_ty)), ReducedTy::UnorderedFields(to_sub_ty))
+            | (ReducedTy::UnorderedFields(from_sub_ty), ReducedTy::OrderedFields(Some(to_sub_ty))) => {
                 from_ty = from_sub_ty;
                 to_ty = to_sub_ty;
                 continue;
             },
-            (ReducedTy::OrderedFields(_, Some(from_sub_ty)), ReducedTy::Other(to_sub_ty)) if reduced_tys.to_fat_ptr => {
+            (ReducedTy::OrderedFields(Some(from_sub_ty)), ReducedTy::Other(to_sub_ty)) if reduced_tys.to_fat_ptr => {
                 from_ty = from_sub_ty;
                 to_ty = to_sub_ty;
                 continue;
             },
-            (ReducedTy::Other(from_sub_ty), ReducedTy::OrderedFields(_, Some(to_sub_ty)))
-                if reduced_tys.from_fat_ptr =>
-            {
+            (ReducedTy::Other(from_sub_ty), ReducedTy::OrderedFields(Some(to_sub_ty))) if reduced_tys.from_fat_ptr => {
                 from_ty = from_sub_ty;
                 to_ty = to_sub_ty;
                 continue;
@@ -235,8 +233,8 @@ enum ReducedTy<'tcx> {
     TypeErasure { raw_ptr_only: bool },
     /// The type is a struct containing either zero non-zero sized fields, or multiple non-zero
     /// sized fields with a defined order.
-    /// The second value is the first non-zero sized type.
-    OrderedFields(Ty<'tcx>, Option<Ty<'tcx>>),
+    /// The value is the first non-zero sized type.
+    OrderedFields(Option<Ty<'tcx>>),
     /// The type is a struct containing multiple non-zero sized fields with no defined order.
     UnorderedFields(Ty<'tcx>),
     /// Any other type.
@@ -259,7 +257,7 @@ fn reduce_ty<'tcx>(cx: &LateContext<'tcx>, mut ty: Ty<'tcx>) -> ReducedTy<'tcx>
             ty::Tuple(args) => {
                 let mut iter = args.iter();
                 let Some(sized_ty) = iter.find(|&ty| !is_zero_sized_ty(cx, ty)) else {
-                    return ReducedTy::OrderedFields(ty, None);
+                    return ReducedTy::OrderedFields(None);
                 };
                 if iter.all(|ty| is_zero_sized_ty(cx, ty)) {
                     ty = sized_ty;
@@ -281,7 +279,7 @@ fn reduce_ty<'tcx>(cx: &LateContext<'tcx>, mut ty: Ty<'tcx>) -> ReducedTy<'tcx>
                     continue;
                 }
                 if def.repr().inhibit_struct_field_reordering_opt() {
-                    ReducedTy::OrderedFields(ty, Some(sized_ty))
+                    ReducedTy::OrderedFields(Some(sized_ty))
                 } else {
                     ReducedTy::UnorderedFields(ty)
                 }
diff --git a/clippy_lints/src/utils/author.rs b/clippy_lints/src/utils/author.rs
index 8817e46b3..8d38b87e1 100644
--- a/clippy_lints/src/utils/author.rs
+++ b/clippy_lints/src/utils/author.rs
@@ -318,17 +318,11 @@ impl<'a, 'tcx> PrintVisitor<'a, 'tcx> {
         self.pat(field!(arm.pat));
         match arm.value.guard {
             None => chain!(self, "{arm}.guard.is_none()"),
-            Some(hir::Guard::If(expr)) => {
+            Some(expr) => {
                 bind!(self, expr);
-                chain!(self, "let Some(Guard::If({expr})) = {arm}.guard");
+                chain!(self, "let Some({expr}) = {arm}.guard");
                 self.expr(expr);
             },
-            Some(hir::Guard::IfLet(let_expr)) => {
-                bind!(self, let_expr);
-                chain!(self, "let Some(Guard::IfLet({let_expr}) = {arm}.guard");
-                self.pat(field!(let_expr.pat));
-                self.expr(field!(let_expr.init));
-            },
         }
         self.expr(field!(arm.body));
     }
diff --git a/clippy_utils/src/attrs.rs b/clippy_utils/src/attrs.rs
index db80e07ca..ad8619f0d 100644
--- a/clippy_utils/src/attrs.rs
+++ b/clippy_utils/src/attrs.rs
@@ -136,7 +136,7 @@ pub fn get_unique_attr<'a>(
         if let Some(duplicate) = unique_attr {
             sess.dcx()
                 .struct_span_err(attr.span, format!("`{name}` is defined multiple times"))
-                .span_note(duplicate.span, "first definition found here")
+                .with_span_note(duplicate.span, "first definition found here")
                 .emit();
         } else {
             unique_attr = Some(attr);
diff --git a/clippy_utils/src/hir_utils.rs b/clippy_utils/src/hir_utils.rs
index e610ed930..07b72e3f5 100644
--- a/clippy_utils/src/hir_utils.rs
+++ b/clippy_utils/src/hir_utils.rs
@@ -8,7 +8,7 @@ use rustc_hir::def::Res;
 use rustc_hir::MatchSource::TryDesugar;
 use rustc_hir::{
     ArrayLen, BinOpKind, BindingAnnotation, Block, BodyId, Closure, Expr, ExprField, ExprKind, FnRetTy, GenericArg,
-    GenericArgs, Guard, HirId, HirIdMap, InlineAsmOperand, Let, Lifetime, LifetimeName, Pat, PatField, PatKind, Path,
+    GenericArgs, HirId, HirIdMap, InlineAsmOperand, Let, Lifetime, LifetimeName, Pat, PatField, PatKind, Path,
     PathSegment, PrimTy, QPath, Stmt, StmtKind, Ty, TyKind, TypeBinding,
 };
 use rustc_lexer::{tokenize, TokenKind};
@@ -320,7 +320,7 @@ impl HirEqInterExpr<'_, '_, '_> {
                     && self.eq_expr(le, re)
                     && over(la, ra, |l, r| {
                         self.eq_pat(l.pat, r.pat)
-                            && both(&l.guard, &r.guard, |l, r| self.eq_guard(l, r))
+                            && both(&l.guard, &r.guard, |l, r| self.eq_expr(l, r))
                             && self.eq_expr(l.body, r.body)
                     })
             },
@@ -410,16 +410,6 @@ impl HirEqInterExpr<'_, '_, '_> {
         left.ident.name == right.ident.name && self.eq_expr(left.expr, right.expr)
     }
 
-    fn eq_guard(&mut self, left: &Guard<'_>, right: &Guard<'_>) -> bool {
-        match (left, right) {
-            (Guard::If(l), Guard::If(r)) => self.eq_expr(l, r),
-            (Guard::IfLet(l), Guard::IfLet(r)) => {
-                self.eq_pat(l.pat, r.pat) && both(&l.ty, &r.ty, |l, r| self.eq_ty(l, r)) && self.eq_expr(l.init, r.init)
-            },
-            _ => false,
-        }
-    }
-
     fn eq_generic_arg(&mut self, left: &GenericArg<'_>, right: &GenericArg<'_>) -> bool {
         match (left, right) {
             (GenericArg::Const(l), GenericArg::Const(r)) => self.eq_body(l.value.body, r.value.body),
@@ -875,8 +865,8 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> {
 
                 for arm in arms {
                     self.hash_pat(arm.pat);
-                    if let Some(ref e) = arm.guard {
-                        self.hash_guard(e);
+                    if let Some(e) = arm.guard {
+                        self.hash_expr(e);
                     }
                     self.hash_expr(arm.body);
                 }
@@ -1056,14 +1046,6 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> {
         }
     }
 
-    pub fn hash_guard(&mut self, g: &Guard<'_>) {
-        match g {
-            Guard::If(expr) | Guard::IfLet(Let { init: expr, .. }) => {
-                self.hash_expr(expr);
-            },
-        }
-    }
-
     pub fn hash_lifetime(&mut self, lifetime: &Lifetime) {
         lifetime.ident.name.hash(&mut self.s);
         std::mem::discriminant(&lifetime.res).hash(&mut self.s);
diff --git a/clippy_utils/src/lib.rs b/clippy_utils/src/lib.rs
index 70a3c6f82..cdf8528f4 100644
--- a/clippy_utils/src/lib.rs
+++ b/clippy_utils/src/lib.rs
@@ -3164,7 +3164,7 @@ pub fn is_never_expr<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) -> Option<
                             self.is_never = false;
                             if let Some(guard) = arm.guard {
                                 let in_final_expr = mem::replace(&mut self.in_final_expr, false);
-                                self.visit_expr(guard.body());
+                                self.visit_expr(guard);
                                 self.in_final_expr = in_final_expr;
                                 // The compiler doesn't consider diverging guards as causing the arm to diverge.
                                 self.is_never = false;
@@ -3223,7 +3223,7 @@ pub fn is_never_expr<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) -> Option<
         fn visit_arm(&mut self, arm: &Arm<'tcx>) {
             if let Some(guard) = arm.guard {
                 let in_final_expr = mem::replace(&mut self.in_final_expr, false);
-                self.visit_expr(guard.body());
+                self.visit_expr(guard);
                 self.in_final_expr = in_final_expr;
             }
             self.visit_expr(arm.body);
diff --git a/rust-toolchain b/rust-toolchain
index 5a2526fd2..2589d46e7 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "nightly-2023-12-28"
+channel = "nightly-2024-01-11"
 components = ["cargo", "llvm-tools", "rust-src", "rust-std", "rustc", "rustc-dev", "rustfmt"]
diff --git a/tests/ui/borrow_interior_mutable_const/auxiliary/helper.rs b/tests/ui/borrow_interior_mutable_const/auxiliary/helper.rs
index b03c21262..96e037d4f 100644
--- a/tests/ui/borrow_interior_mutable_const/auxiliary/helper.rs
+++ b/tests/ui/borrow_interior_mutable_const/auxiliary/helper.rs
@@ -2,7 +2,6 @@
 // As the most common case is the `http` crate, it replicates `http::HeaderName`'s structure.
 
 #![allow(clippy::declare_interior_mutable_const)]
-#![allow(unused_tuple_struct_fields)]
 
 use std::sync::atomic::AtomicUsize;
 
diff --git a/tests/ui/crashes/ice-6251.stderr b/tests/ui/crashes/ice-6251.stderr
index 11081dc80..0196c9923 100644
--- a/tests/ui/crashes/ice-6251.stderr
+++ b/tests/ui/crashes/ice-6251.stderr
@@ -6,7 +6,7 @@ LL | fn bug<T>() -> impl Iterator<Item = [(); { |x: [u8]| x }]> {
    |
    = help: the trait `std::marker::Sized` is not implemented for `[u8]`
    = help: unsized fn params are gated as an unstable feature
-help: function arguments must have a statically known size, borrowed types always have a known size
+help: function arguments must have a statically known size, borrowed slices always have a known size
    |
 LL | fn bug<T>() -> impl Iterator<Item = [(); { |x: &[u8]| x }]> {
    |                                                +
diff --git a/tests/ui/crashes/ice-6252.stderr b/tests/ui/crashes/ice-6252.stderr
index f929bec95..f6d097609 100644
--- a/tests/ui/crashes/ice-6252.stderr
+++ b/tests/ui/crashes/ice-6252.stderr
@@ -8,8 +8,6 @@ help: consider importing one of these items
    |
 LL + use core::marker::PhantomData;
    |
-LL + use serde::__private::PhantomData;
-   |
 LL + use std::marker::PhantomData;
    |
 
diff --git a/tests/ui/format.fixed b/tests/ui/format.fixed
index 36679a9c8..2b32fdeae 100644
--- a/tests/ui/format.fixed
+++ b/tests/ui/format.fixed
@@ -1,6 +1,5 @@
 #![warn(clippy::useless_format)]
 #![allow(
-    unused_tuple_struct_fields,
     clippy::print_literal,
     clippy::redundant_clone,
     clippy::to_string_in_format_args,
diff --git a/tests/ui/format.rs b/tests/ui/format.rs
index b0920daf0..bad192067 100644
--- a/tests/ui/format.rs
+++ b/tests/ui/format.rs
@@ -1,6 +1,5 @@
 #![warn(clippy::useless_format)]
 #![allow(
-    unused_tuple_struct_fields,
     clippy::print_literal,
     clippy::redundant_clone,
     clippy::to_string_in_format_args,
diff --git a/tests/ui/format.stderr b/tests/ui/format.stderr
index d4630a8f1..e02fdb1e4 100644
--- a/tests/ui/format.stderr
+++ b/tests/ui/format.stderr
@@ -1,5 +1,5 @@
 error: useless use of `format!`
-  --> $DIR/format.rs:20:5
+  --> $DIR/format.rs:19:5
    |
 LL |     format!("foo");
    |     ^^^^^^^^^^^^^^ help: consider using `.to_string()`: `"foo".to_string()`
@@ -8,19 +8,19 @@ LL |     format!("foo");
    = help: to override `-D warnings` add `#[allow(clippy::useless_format)]`
 
 error: useless use of `format!`
-  --> $DIR/format.rs:21:5
+  --> $DIR/format.rs:20:5
    |
 LL |     format!("{{}}");
    |     ^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `"{}".to_string()`
 
 error: useless use of `format!`
-  --> $DIR/format.rs:22:5
+  --> $DIR/format.rs:21:5
    |
 LL |     format!("{{}} abc {{}}");
    |     ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `"{} abc {}".to_string()`
 
 error: useless use of `format!`
-  --> $DIR/format.rs:23:5
+  --> $DIR/format.rs:22:5
    |
 LL | /     format!(
 LL | |         r##"foo {{}}
@@ -35,67 +35,67 @@ LL ~ " bar"##.to_string();
    |
 
 error: useless use of `format!`
-  --> $DIR/format.rs:28:13
+  --> $DIR/format.rs:27:13
    |
 LL |     let _ = format!("");
    |             ^^^^^^^^^^^ help: consider using `String::new()`: `String::new()`
 
 error: useless use of `format!`
-  --> $DIR/format.rs:30:5
+  --> $DIR/format.rs:29:5
    |
 LL |     format!("{}", "foo");
    |     ^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `"foo".to_string()`
 
 error: useless use of `format!`
-  --> $DIR/format.rs:38:5
+  --> $DIR/format.rs:37:5
    |
 LL |     format!("{}", arg);
    |     ^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `arg.to_string()`
 
 error: useless use of `format!`
-  --> $DIR/format.rs:68:5
+  --> $DIR/format.rs:67:5
    |
 LL |     format!("{}", 42.to_string());
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `42.to_string()`
 
 error: useless use of `format!`
-  --> $DIR/format.rs:70:5
+  --> $DIR/format.rs:69:5
    |
 LL |     format!("{}", x.display().to_string());
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `x.display().to_string()`
 
 error: useless use of `format!`
-  --> $DIR/format.rs:74:18
+  --> $DIR/format.rs:73:18
    |
 LL |     let _ = Some(format!("{}", a + "bar"));
    |                  ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `a + "bar"`
 
 error: useless use of `format!`
-  --> $DIR/format.rs:78:22
+  --> $DIR/format.rs:77:22
    |
 LL |     let _s: String = format!("{}", &*v.join("\n"));
    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `(&*v.join("\n")).to_string()`
 
 error: useless use of `format!`
-  --> $DIR/format.rs:84:13
+  --> $DIR/format.rs:83:13
    |
 LL |     let _ = format!("{x}");
    |             ^^^^^^^^^^^^^^ help: consider using `.to_string()`: `x.to_string()`
 
 error: useless use of `format!`
-  --> $DIR/format.rs:86:13
+  --> $DIR/format.rs:85:13
    |
 LL |     let _ = format!("{y}", y = x);
    |             ^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `x.to_string()`
 
 error: useless use of `format!`
-  --> $DIR/format.rs:90:13
+  --> $DIR/format.rs:89:13
    |
 LL |     let _ = format!("{abc}");
    |             ^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `abc.to_string()`
 
 error: useless use of `format!`
-  --> $DIR/format.rs:92:13
+  --> $DIR/format.rs:91:13
    |
 LL |     let _ = format!("{xx}");
    |             ^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `xx.to_string()`
diff --git a/tests/ui/from_iter_instead_of_collect.fixed b/tests/ui/from_iter_instead_of_collect.fixed
index 82c8e1d8a..c250162df 100644
--- a/tests/ui/from_iter_instead_of_collect.fixed
+++ b/tests/ui/from_iter_instead_of_collect.fixed
@@ -1,5 +1,5 @@
 #![warn(clippy::from_iter_instead_of_collect)]
-#![allow(unused_imports, unused_tuple_struct_fields)]
+#![allow(unused_imports)]
 #![allow(clippy::useless_vec)]
 
 use std::collections::{BTreeMap, BTreeSet, HashMap, VecDeque};
diff --git a/tests/ui/from_iter_instead_of_collect.rs b/tests/ui/from_iter_instead_of_collect.rs
index 2aed6b14b..8adbb841c 100644
--- a/tests/ui/from_iter_instead_of_collect.rs
+++ b/tests/ui/from_iter_instead_of_collect.rs
@@ -1,5 +1,5 @@
 #![warn(clippy::from_iter_instead_of_collect)]
-#![allow(unused_imports, unused_tuple_struct_fields)]
+#![allow(unused_imports)]
 #![allow(clippy::useless_vec)]
 
 use std::collections::{BTreeMap, BTreeSet, HashMap, VecDeque};
diff --git a/tests/ui/must_use_candidates.fixed b/tests/ui/must_use_candidates.fixed
index 3ed705b29..c057eba4a 100644
--- a/tests/ui/must_use_candidates.fixed
+++ b/tests/ui/must_use_candidates.fixed
@@ -1,10 +1,5 @@
 #![feature(never_type)]
-#![allow(
-    unused_mut,
-    unused_tuple_struct_fields,
-    clippy::redundant_allocation,
-    clippy::needless_pass_by_ref_mut
-)]
+#![allow(unused_mut, clippy::redundant_allocation, clippy::needless_pass_by_ref_mut)]
 #![warn(clippy::must_use_candidate)]
 use std::rc::Rc;
 use std::sync::atomic::{AtomicBool, Ordering};
diff --git a/tests/ui/must_use_candidates.rs b/tests/ui/must_use_candidates.rs
index ab8efea0a..360196520 100644
--- a/tests/ui/must_use_candidates.rs
+++ b/tests/ui/must_use_candidates.rs
@@ -1,10 +1,5 @@
 #![feature(never_type)]
-#![allow(
-    unused_mut,
-    unused_tuple_struct_fields,
-    clippy::redundant_allocation,
-    clippy::needless_pass_by_ref_mut
-)]
+#![allow(unused_mut, clippy::redundant_allocation, clippy::needless_pass_by_ref_mut)]
 #![warn(clippy::must_use_candidate)]
 use std::rc::Rc;
 use std::sync::atomic::{AtomicBool, Ordering};
diff --git a/tests/ui/must_use_candidates.stderr b/tests/ui/must_use_candidates.stderr
index 581399f3e..98175dbd4 100644
--- a/tests/ui/must_use_candidates.stderr
+++ b/tests/ui/must_use_candidates.stderr
@@ -1,5 +1,5 @@
 error: this function could have a `#[must_use]` attribute
-  --> $DIR/must_use_candidates.rs:16:1
+  --> $DIR/must_use_candidates.rs:11:1
    |
 LL | pub fn pure(i: u8) -> u8 {
    | ^^^^^^^^^^^^^^^^^^^^^^^^ help: add the attribute: `#[must_use] pub fn pure(i: u8) -> u8`
@@ -8,25 +8,25 @@ LL | pub fn pure(i: u8) -> u8 {
    = help: to override `-D warnings` add `#[allow(clippy::must_use_candidate)]`
 
 error: this method could have a `#[must_use]` attribute
-  --> $DIR/must_use_candidates.rs:21:5
+  --> $DIR/must_use_candidates.rs:16:5
    |
 LL |     pub fn inherent_pure(&self) -> u8 {
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: add the attribute: `#[must_use] pub fn inherent_pure(&self) -> u8`
 
 error: this function could have a `#[must_use]` attribute
-  --> $DIR/must_use_candidates.rs:52:1
+  --> $DIR/must_use_candidates.rs:47:1
    |
 LL | pub fn with_marker(_d: std::marker::PhantomData<&mut u32>) -> bool {
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: add the attribute: `#[must_use] pub fn with_marker(_d: std::marker::PhantomData<&mut u32>) -> bool`
 
 error: this function could have a `#[must_use]` attribute
-  --> $DIR/must_use_candidates.rs:64:1
+  --> $DIR/must_use_candidates.rs:59:1
    |
 LL | pub fn rcd(_x: Rc<u32>) -> bool {
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: add the attribute: `#[must_use] pub fn rcd(_x: Rc<u32>) -> bool`
 
 error: this function could have a `#[must_use]` attribute
-  --> $DIR/must_use_candidates.rs:72:1
+  --> $DIR/must_use_candidates.rs:67:1
    |
 LL | pub fn arcd(_x: Arc<u32>) -> bool {
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: add the attribute: `#[must_use] pub fn arcd(_x: Arc<u32>) -> bool`
diff --git a/tests/ui/numbered_fields.fixed b/tests/ui/numbered_fields.fixed
index 7f0a6f8e5..dc88081ba 100644
--- a/tests/ui/numbered_fields.fixed
+++ b/tests/ui/numbered_fields.fixed
@@ -1,5 +1,4 @@
 #![warn(clippy::init_numbered_fields)]
-#![allow(unused_tuple_struct_fields)]
 
 #[derive(Default)]
 struct TupleStruct(u32, u32, u8);
diff --git a/tests/ui/numbered_fields.rs b/tests/ui/numbered_fields.rs
index 38f3b36ec..e8fa652e3 100644
--- a/tests/ui/numbered_fields.rs
+++ b/tests/ui/numbered_fields.rs
@@ -1,5 +1,4 @@
 #![warn(clippy::init_numbered_fields)]
-#![allow(unused_tuple_struct_fields)]
 
 #[derive(Default)]
 struct TupleStruct(u32, u32, u8);
diff --git a/tests/ui/numbered_fields.stderr b/tests/ui/numbered_fields.stderr
index d52a0cf15..76f5e082f 100644
--- a/tests/ui/numbered_fields.stderr
+++ b/tests/ui/numbered_fields.stderr
@@ -1,5 +1,5 @@
 error: used a field initializer for a tuple struct
-  --> $DIR/numbered_fields.rs:18:13
+  --> $DIR/numbered_fields.rs:17:13
    |
 LL |       let _ = TupleStruct {
    |  _____________^
@@ -13,7 +13,7 @@ LL | |     };
    = help: to override `-D warnings` add `#[allow(clippy::init_numbered_fields)]`
 
 error: used a field initializer for a tuple struct
-  --> $DIR/numbered_fields.rs:25:13
+  --> $DIR/numbered_fields.rs:24:13
    |
 LL |       let _ = TupleStruct {
    |  _____________^
diff --git a/tests/ui/option_if_let_else.fixed b/tests/ui/option_if_let_else.fixed
index 363520112..d443334bb 100644
--- a/tests/ui/option_if_let_else.fixed
+++ b/tests/ui/option_if_let_else.fixed
@@ -1,6 +1,5 @@
 #![warn(clippy::option_if_let_else)]
 #![allow(
-    unused_tuple_struct_fields,
     clippy::ref_option_ref,
     clippy::equatable_if_let,
     clippy::let_unit_value,
diff --git a/tests/ui/option_if_let_else.rs b/tests/ui/option_if_let_else.rs
index aaa87a0db..317c35bf8 100644
--- a/tests/ui/option_if_let_else.rs
+++ b/tests/ui/option_if_let_else.rs
@@ -1,6 +1,5 @@
 #![warn(clippy::option_if_let_else)]
 #![allow(
-    unused_tuple_struct_fields,
     clippy::ref_option_ref,
     clippy::equatable_if_let,
     clippy::let_unit_value,
diff --git a/tests/ui/option_if_let_else.stderr b/tests/ui/option_if_let_else.stderr
index 55a8360ff..e053d356f 100644
--- a/tests/ui/option_if_let_else.stderr
+++ b/tests/ui/option_if_let_else.stderr
@@ -1,5 +1,5 @@
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:11:5
+  --> $DIR/option_if_let_else.rs:10:5
    |
 LL | /     if let Some(x) = string {
 LL | |         (true, x)
@@ -12,19 +12,19 @@ LL | |     }
    = help: to override `-D warnings` add `#[allow(clippy::option_if_let_else)]`
 
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:29:13
+  --> $DIR/option_if_let_else.rs:28:13
    |
 LL |     let _ = if let Some(s) = *string { s.len() } else { 0 };
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `string.map_or(0, |s| s.len())`
 
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:30:13
+  --> $DIR/option_if_let_else.rs:29:13
    |
 LL |     let _ = if let Some(s) = &num { s } else { &0 };
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `num.as_ref().map_or(&0, |s| s)`
 
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:31:13
+  --> $DIR/option_if_let_else.rs:30:13
    |
 LL |       let _ = if let Some(s) = &mut num {
    |  _____________^
@@ -44,13 +44,13 @@ LL ~     });
    |
 
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:37:13
+  --> $DIR/option_if_let_else.rs:36:13
    |
 LL |     let _ = if let Some(ref s) = num { s } else { &0 };
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `num.as_ref().map_or(&0, |s| s)`
 
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:38:13
+  --> $DIR/option_if_let_else.rs:37:13
    |
 LL |       let _ = if let Some(mut s) = num {
    |  _____________^
@@ -70,7 +70,7 @@ LL ~     });
    |
 
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:44:13
+  --> $DIR/option_if_let_else.rs:43:13
    |
 LL |       let _ = if let Some(ref mut s) = num {
    |  _____________^
@@ -90,7 +90,7 @@ LL ~     });
    |
 
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:53:5
+  --> $DIR/option_if_let_else.rs:52:5
    |
 LL | /     if let Some(x) = arg {
 LL | |         let y = x * x;
@@ -109,7 +109,7 @@ LL +     })
    |
 
 error: use Option::map_or_else instead of an if let/else
-  --> $DIR/option_if_let_else.rs:66:13
+  --> $DIR/option_if_let_else.rs:65:13
    |
 LL |       let _ = if let Some(x) = arg {
    |  _____________^
@@ -121,7 +121,7 @@ LL | |     };
    | |_____^ help: try: `arg.map_or_else(side_effect, |x| x)`
 
 error: use Option::map_or_else instead of an if let/else
-  --> $DIR/option_if_let_else.rs:75:13
+  --> $DIR/option_if_let_else.rs:74:13
    |
 LL |       let _ = if let Some(x) = arg {
    |  _____________^
@@ -144,7 +144,7 @@ LL ~     }, |x| x * x * x * x);
    |
 
 error: use Option::map_or_else instead of an if let/else
-  --> $DIR/option_if_let_else.rs:108:13
+  --> $DIR/option_if_let_else.rs:107:13
    |
 LL | /             if let Some(idx) = s.find('.') {
 LL | |                 vec![s[..idx].to_string(), s[idx..].to_string()]
@@ -154,7 +154,7 @@ LL | |             }
    | |_____________^ help: try: `s.find('.').map_or_else(|| vec![s.to_string()], |idx| vec![s[..idx].to_string(), s[idx..].to_string()])`
 
 error: use Option::map_or_else instead of an if let/else
-  --> $DIR/option_if_let_else.rs:119:5
+  --> $DIR/option_if_let_else.rs:118:5
    |
 LL | /     if let Ok(binding) = variable {
 LL | |         println!("Ok {binding}");
@@ -177,13 +177,13 @@ LL +     })
    |
 
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:143:13
+  --> $DIR/option_if_let_else.rs:142:13
    |
 LL |     let _ = if let Some(x) = optional { x + 2 } else { 5 };
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `optional.map_or(5, |x| x + 2)`
 
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:153:13
+  --> $DIR/option_if_let_else.rs:152:13
    |
 LL |       let _ = if let Some(x) = Some(0) {
    |  _____________^
@@ -205,13 +205,13 @@ LL ~         });
    |
 
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:181:13
+  --> $DIR/option_if_let_else.rs:180:13
    |
 LL |     let _ = if let Some(x) = Some(0) { s.len() + x } else { s.len() };
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `Some(0).map_or(s.len(), |x| s.len() + x)`
 
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:185:13
+  --> $DIR/option_if_let_else.rs:184:13
    |
 LL |       let _ = if let Some(x) = Some(0) {
    |  _____________^
@@ -231,7 +231,7 @@ LL ~     });
    |
 
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:224:13
+  --> $DIR/option_if_let_else.rs:223:13
    |
 LL |       let _ = match s {
    |  _____________^
@@ -241,7 +241,7 @@ LL | |     };
    | |_____^ help: try: `s.map_or(1, |string| string.len())`
 
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:228:13
+  --> $DIR/option_if_let_else.rs:227:13
    |
 LL |       let _ = match Some(10) {
    |  _____________^
@@ -251,7 +251,7 @@ LL | |     };
    | |_____^ help: try: `Some(10).map_or(5, |a| a + 1)`
 
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:234:13
+  --> $DIR/option_if_let_else.rs:233:13
    |
 LL |       let _ = match res {
    |  _____________^
@@ -261,7 +261,7 @@ LL | |     };
    | |_____^ help: try: `res.map_or(1, |a| a + 1)`
 
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:238:13
+  --> $DIR/option_if_let_else.rs:237:13
    |
 LL |       let _ = match res {
    |  _____________^
@@ -271,13 +271,13 @@ LL | |     };
    | |_____^ help: try: `res.map_or(1, |a| a + 1)`
 
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:242:13
+  --> $DIR/option_if_let_else.rs:241:13
    |
 LL |     let _ = if let Ok(a) = res { a + 1 } else { 5 };
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `res.map_or(5, |a| a + 1)`
 
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:259:17
+  --> $DIR/option_if_let_else.rs:258:17
    |
 LL |           let _ = match initial {
    |  _________________^
@@ -287,7 +287,7 @@ LL | |         };
    | |_________^ help: try: `initial.as_ref().map_or(42, |value| do_something(value))`
 
 error: use Option::map_or instead of an if let/else
-  --> $DIR/option_if_let_else.rs:266:17
+  --> $DIR/option_if_let_else.rs:265:17
    |
 LL |           let _ = match initial {
    |  _________________^
@@ -297,7 +297,7 @@ LL | |         };
    | |_________^ help: try: `initial.as_mut().map_or(42, |value| do_something2(value))`
 
 error: use Option::map_or_else instead of an if let/else
-  --> $DIR/option_if_let_else.rs:289:24
+  --> $DIR/option_if_let_else.rs:288:24
    |
 LL |       let mut _hashmap = if let Some(hm) = &opt {
    |  ________________________^
@@ -308,7 +308,7 @@ LL | |     };
    | |_____^ help: try: `opt.as_ref().map_or_else(HashMap::new, |hm| hm.clone())`
 
 error: use Option::map_or_else instead of an if let/else
-  --> $DIR/option_if_let_else.rs:295:19
+  --> $DIR/option_if_let_else.rs:294:19
    |
 LL |     let mut _hm = if let Some(hm) = &opt { hm.clone() } else { new_map!() };
    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `opt.as_ref().map_or_else(|| new_map!(), |hm| hm.clone())`
diff --git a/tests/ui/unreadable_literal.fixed b/tests/ui/unreadable_literal.fixed
index 6d8c719ee..fb9c2672d 100644
--- a/tests/ui/unreadable_literal.fixed
+++ b/tests/ui/unreadable_literal.fixed
@@ -1,5 +1,4 @@
 #![warn(clippy::unreadable_literal)]
-#![allow(unused_tuple_struct_fields)]
 
 struct Foo(u64);
 
diff --git a/tests/ui/unreadable_literal.rs b/tests/ui/unreadable_literal.rs
index 42ca773c3..0a24fa852 100644
--- a/tests/ui/unreadable_literal.rs
+++ b/tests/ui/unreadable_literal.rs
@@ -1,5 +1,4 @@
 #![warn(clippy::unreadable_literal)]
-#![allow(unused_tuple_struct_fields)]
 
 struct Foo(u64);
 
diff --git a/tests/ui/unreadable_literal.stderr b/tests/ui/unreadable_literal.stderr
index d7a3377ec..37f91acf8 100644
--- a/tests/ui/unreadable_literal.stderr
+++ b/tests/ui/unreadable_literal.stderr
@@ -1,5 +1,5 @@
 error: long literal lacking separators
-  --> $DIR/unreadable_literal.rs:32:17
+  --> $DIR/unreadable_literal.rs:31:17
    |
 LL |     let _bad = (0b110110_i64, 0x12345678_usize, 123456_f32, 1.234567_f32);
    |                 ^^^^^^^^^^^^ help: consider: `0b11_0110_i64`
@@ -8,55 +8,55 @@ LL |     let _bad = (0b110110_i64, 0x12345678_usize, 123456_f32, 1.234567_f32);
    = help: to override `-D warnings` add `#[allow(clippy::unreadable_literal)]`
 
 error: long literal lacking separators
-  --> $DIR/unreadable_literal.rs:32:31
+  --> $DIR/unreadable_literal.rs:31:31
    |
 LL |     let _bad = (0b110110_i64, 0x12345678_usize, 123456_f32, 1.234567_f32);
    |                               ^^^^^^^^^^^^^^^^ help: consider: `0x1234_5678_usize`
 
 error: long literal lacking separators
-  --> $DIR/unreadable_literal.rs:32:49
+  --> $DIR/unreadable_literal.rs:31:49
    |
 LL |     let _bad = (0b110110_i64, 0x12345678_usize, 123456_f32, 1.234567_f32);
    |                                                 ^^^^^^^^^^ help: consider: `123_456_f32`
 
 error: long literal lacking separators
-  --> $DIR/unreadable_literal.rs:32:61
+  --> $DIR/unreadable_literal.rs:31:61
    |
 LL |     let _bad = (0b110110_i64, 0x12345678_usize, 123456_f32, 1.234567_f32);
    |                                                             ^^^^^^^^^^^^ help: consider: `1.234_567_f32`
 
 error: long literal lacking separators
-  --> $DIR/unreadable_literal.rs:34:20
+  --> $DIR/unreadable_literal.rs:33:20
    |
 LL |     let _bad_sci = 1.123456e1;
    |                    ^^^^^^^^^^ help: consider: `1.123_456e1`
 
 error: long literal lacking separators
-  --> $DIR/unreadable_literal.rs:36:18
+  --> $DIR/unreadable_literal.rs:35:18
    |
 LL |     let _fail1 = 0xabcdef;
    |                  ^^^^^^^^ help: consider: `0x00ab_cdef`
 
 error: long literal lacking separators
-  --> $DIR/unreadable_literal.rs:37:23
+  --> $DIR/unreadable_literal.rs:36:23
    |
 LL |     let _fail2: u32 = 0xBAFEBAFE;
    |                       ^^^^^^^^^^ help: consider: `0xBAFE_BAFE`
 
 error: long literal lacking separators
-  --> $DIR/unreadable_literal.rs:38:18
+  --> $DIR/unreadable_literal.rs:37:18
    |
 LL |     let _fail3 = 0xabcdeff;
    |                  ^^^^^^^^^ help: consider: `0x0abc_deff`
 
 error: long literal lacking separators
-  --> $DIR/unreadable_literal.rs:39:24
+  --> $DIR/unreadable_literal.rs:38:24
    |
 LL |     let _fail4: i128 = 0xabcabcabcabcabcabc;
    |                        ^^^^^^^^^^^^^^^^^^^^ help: consider: `0x00ab_cabc_abca_bcab_cabc`
 
 error: long literal lacking separators
-  --> $DIR/unreadable_literal.rs:40:18
+  --> $DIR/unreadable_literal.rs:39:18
    |
 LL |     let _fail5 = 1.100300400;
    |                  ^^^^^^^^^^^ help: consider: `1.100_300_400`